In Gnome we need an extra package called gnome-tweak-tool to change icons, themes, cursors and much more.
We use the Activities in the top left to get an overview of all your applications and windows that are open. You can start typing to look for an application.
You can activate this also by pressing Super.
For the i3 users
I installed also dmenu in this desktop.
Activate it with Super + Shift + D